san antonio water system’s 2012 water management plan · 2013. 7. 25. · • steve kosub, senior...
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![Page 1: San Antonio Water System’s 2012 Water Management Plan · 2013. 7. 25. · • Steve Kosub, Senior Water Resources Counsel • Hope Wells, Corporate Counsel . July 25, 2013 SAWS](https://reader035.vdocuments.net/reader035/viewer/2022070923/5fbb79475c727f35d9150d66/html5/thumbnails/1.jpg)
Capital Improvements Advisory Committee
Darren Thompson Director, Water Resources
San Antonio Water System’s 2012 Water Management Plan
July 25, 2013
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July 25, 2013
SAWS 2012 Water Management Plan Page 2
Outline • Planning Assumptions
• SAWS Current Water Resources
• DOR Outlook (No New Supplies)
• SAWS Planned Water Resources
• DOR Outlook (Near-Term)
• Next Steps
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July 25, 2013
SAWS 2012 Water Management Plan Page 3
Why a New Plan? Many Changes Since 2009 • 2010 Census Data • BexarMet Integration • Termination of LCRA-SAWS Project • Changes to Regional Carrizo and Brackish
Desalination Projects • Increased Aquifer Storage & Recovery (ASR)
Storage • Edwards Aquifer Recovery Implementation
Program (EARIP) • Water Supply Proposals (RFCSP)
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July 25, 2013
SAWS 2012 Water Management Plan Page 4
2012 Water Management Plan Task Force Members
• Robert R. Puente, President/CEO • Kelley Neumann, P.E., Senior Vice President, Strategic
Resources • Doug Evanson, Senior Vice President/Chief Financial Officer • Charles Ahrens, Vice President, Water Resources and
Conservation • Greg Flores, Vice President, Public Affairs • Steve Kosub, Senior Water Resources Counsel • Hope Wells, Corporate Counsel
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July 25, 2013
SAWS 2012 Water Management Plan Page 5
Planning Assumptions Population
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July 25, 2013
SAWS 2012 Water Management Plan Page 6
Planning Assumptions Population (SAWS Only)
500,000
700,000
900,000
1,100,000
1,300,000
1,500,000
1,700,000
1,900,000
2,100,000
2,300,000
2,500,000
Popu
latio
n
1998 2005 2009 2012
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July 25, 2013
SAWS 2012 Water Management Plan Page 7
Planning Assumptions Population (SAWS + DSP)
0
500,000
1,000,000
1,500,000
2,000,000
2,500,000
3,000,000
2000 2010 2020 2030 2040 2050 2060 2070 2080
Combined Population SAWS Population DSP Population
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SAWS 2012 Water Management Plan Page 8
Planning Assumptions Drought of Record Supply Impacts
600
610
620
630
640
650
660
670
680
J-17
Lev
el ('m
sl)
% E
dwar
ds S
uppl
y A
vaila
ble
100%
80%
70%
65%
56%
Year 189.81%
Year 274%
Year 368.87%
Year 469.19%
Year 564.34%
Year 660.2%
Year 757.57%
Year 864.18%
Year 995.64%
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SAWS 2012 Water Management Plan Page 9
Planning Assumptions Summary
• Per Capita Water Use – 143 GPCD in 2011, the hottest, driest year recorded in
Texas, reducing to 135 GPCD
• Population Projection for Entire Service Area – 1.2% annual growth or ~20,000 people per year
• Water Supplies – As impacted by drought and the deepest restrictions
• Drought of Record – Replicate the worst case scenario from the 1950s
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July 25, 2013
SAWS 2012 Water Management Plan Page 10
SAWS Current Water Resources Edwards Aquifer
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July 25, 2013
SAWS 2012 Water Management Plan Page 11
SAWS Current Water Resources Twin Oaks Facility
• ASR •3rd-Largest in Nation •“Savings account for a sunny day” •Currently ~80,000 acre-feet (AF) in storage, or six months of supply
• Local Carrizo •Additional 9,000 acre-feet per year (AFY)
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July 25, 2013
SAWS 2012 Water Management Plan Page 12
SAWS Current Water Resources Trinity Aquifer
• WECo Stein Tract/Rogers Tract
• DSP Trinity Aquifer wells
• Oliver Ranch: ~3,000 AFY • BSR: ~500 AFY • First Non-Edwards Supply for SAWS
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July 25, 2013
SAWS 2012 Water Management Plan Page 13
SAWS Current Water Resources Western Canyon • Base 4,000 AFY
(up to 11,000 AFY)
• 2005 – 2007
• First surface-water supply for SAWS
• Supplies north San Antonio
• Contract currently
expires in 2037
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July 25, 2013
SAWS 2012 Water Management Plan Page 14
SAWS Current Water Resources Canyon Regional Water Authority (CRWA)
• Lake Dunlap – 4,000 AFY* • Wells Ranch – 2,800 AFY (Carrizo) • Total – 6,800 AFY* • Supply Assumptions
– *500 AFY lease to Cibolo through 2018 – Lake Dunlap supply may go away in 2024 as per
agreement with Guadalupe-Blanco River Authority – Agreement with Canyon Regional Water Authority
concerning Wells Ranch expires in 2047, extendable
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July 25, 2013
SAWS 2012 Water Management Plan Page 15
SAWS Current Water Resources Medina Lake
• Inherited from Bexar Met • SAWS Lease from BMA = 19,974 AFY • SAWS Run-of-River Rights = ~9,000 AFY • SAWS Treatment Capacity = ~13,000 AFY
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July 25, 2013
SAWS 2012 Water Management Plan Page 16
SAWS Current Water Resources Regional Carrizo
• Regional Partnership with Schertz-Seguin Local Government Corporation (SSLGC)
• SAWS Permit 11,688 AFY
• Excess from SSLGC and Gonzales Water Supply Corporation 5,512 AFY
• Total 17,200 AFY (up to amount)
• Delivery late 2013
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SAWS 2012 Water Management Plan Page 17
SAWS Current Water Resources Regional Carrizo
• Mutual Regional Water Supply Contract – Reserves space for SAWS water in existing pipeline – Gives SAWS ability to purchase SSLGC surplus water – Provides SSLGC an emergency supply – Reduces cost for all parties
• $133 million estimated total cost • $82 million committed, as of July 2013
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July 25, 2013
SAWS 2012 Water Management Plan Page 18
DOR Outlook (No New Supplies)
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SAWS 2012 Water Management Plan Page 19
Planned Supplies Brackish Groundwater Desalination
• On SAWS property in Bexar County
• Three-Phase Program – Phase 1: 13,440 ac-ft/yr (2016)
– Phase 2: 13,440 ac-ft/yr (2021)
– Phase 3: 6,720 ac-ft/yr (2026)
– Total: 33,600 ac-ft/yr
• $296.8 million estimated total cost – $179 million for Phase 1
– $74 million committed, as of July 2013
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SAWS 2012 Water Management Plan Page 20
SAWS Planned Water Resources Expanded Carrizo
• New project concept
• Works in cooperation with the ASR Local Carrizo off-site wells
• May be able to utilize infrastructure that DSP started
• Geology and preliminary feasibility indicate up to 21,000 AFY of production – Groundwater Management Area 13 Desired Future
Conditions not exceeded
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SAWS 2012 Water Management Plan Page 21
SAWS Planned Water Resources Water Resources Integration Pipeline (WRIP)
• 45-mile integration pipeline – Phase I complete by 2016 – Phase II complete by 2022
• Provides transport flexibility – Desal supply – Local Carrizo Aquifer supply – Expanded Carrizo Aquifer
supply – ASR supply
• $205 million estimated program cost, as of July 2013
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SAWS 2012 Water Management Plan Page 22
Regional Water Supply Project
• Request for Competitive Sealed Proposals for 50,000 AFY by 2018
• SAWS currently evaluating four proposals: – Abengoa
– Dimmit Utility Water Supply Corporation
– Oscar Renda Contracting
– V.V. Water Company, L.L.C.
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July 25, 2013
SAWS 2012 Water Management Plan Page 23
Regional Water Supply Project
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July 25, 2013
SAWS 2012 Water Management Plan Page 24
DOR Outlook (Near-Term)
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SAWS 2012 Water Management Plan Page 25
Canyon Lake
Trinity Aquifer
Regional Carrizo & CRWA Wells Ranch (2013)
Managing the Drought of Record (DOR) Supply Diversification
Medina River & Lake
CRWA Lake Dunlap
Local Carrizo Aquifer, Stored Edwards (ASR)
& Brackish Desal (2016)
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SAWS 2012 Water Management Plan Page 26
Next Steps Implementation
• Regional Carrizo coming online late 2013
• Brackish Desal design and construction in progress, expected online by 2016
• Expanded Carrizo design and construction in planning stages, expected online by 2017
• RFCSP proposals being evaluated
• 2012 WMP represents a sustainable, affordable water supply strategy through 2040
• Adaptive management crucial to plan’s success
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Capital Improvements Advisory Committee
Darren Thompson Director, Water Resources
San Antonio Water System’s 2012 Water Management Plan
July 25, 2013